(FILECREATED "24-Aug-85 13:23:34" {ERIS}<LISPCORE>SOURCES>DOVEDISPLAYHACK.;4
 4507   

      changes to:  (VARS DOVEDISPLAYHACKCOMS)

      previous date: "23-Jul-85 00:04:28" {ERIS}<LISPCORE>SOURCES>DOVEDISPLAYHACK.;3)


(* Copyright (c) 1985 by XEROX. All rights reserved.)

(PRETTYCOMPRINT DOVEDISPLAYHACKCOMS)

(RPAQQ DOVEDISPLAYHACKCOMS
 ((FNS \STARTDISPLAY \CreateScreenBitMap)
			    (DECLARE: DONTEVAL@LOAD DOCOPY (P (\LOCKFN (FUNCTION 
								   \DoveDisplay.SetCursorPosition)))))
)
(DEFINEQ

(\STARTDISPLAY

  (LAMBDA NIL                                                (* jwo: "23-Jul-85 00:04")

    (DECLARE
 (
GLOBALVARS
 SCREENWIDTH SCREENHEIGHT))
    (
COND

      ((
NEQ
 \MACHINETYPE \DAYBREAK)
	(
SETQ
 ScreenBitMap (\CreateScreenBitMap
 SCREENWIDTH SCREENHEIGHT))))
    (UNINTERRUPTABLY
        (
SHOWDISPLAY
 (fetch
 BITMAPBASE of
 ScreenBitMap)
		     (fetch
 BITMAPRASTERWIDTH of
 ScreenBitMap))
	(
CHANGETTYDEVICE
 (
QUOTE
 LISPDISPLAY))
	(
SETQ
 \DisplayStarted T))
    (
COND

      ((
AND
 (
NEQ
 \KEYBOARD.BEFORETYPE \DAYBREAK)
	    (
EQ
 \MACHINETYPE \DAYBREAK))
	(
PROG
 (OLDWINDOWS)
	      (
SETQ
 OLDWINDOWS (
COPY
 (
OPENWINDOWS
)))
	      (for
 W in
 OLDWINDOWS do
 (
PROG
 ((WREG (fetch
 (WINDOW REG) of
 W)))

          (* * This gook is designed to move open windows into reasonable positions on the Daybreak screen, from wherever they

	  were on the LOADUP machine. The LOADUP process needs to be fixed to just leave around functions that initialize the 

	  screen and related things in a machine dependent (intelligent) way.)



					    (
MOVEW
 W (
IQUOTIENT
 (
ITIMES
 4 (fetch
 (REGION LEFT)
									     of
 WREG))
								5)
						   (
IQUOTIENT
 (
ITIMES
 (fetch
 (REGION BOTTOM)
									 of
 WREG)
								      3)
							      4))
					    (
\CLOSEW1
 W)))
	      (
SETQ
 ScreenBitMap (\CreateScreenBitMap
 (
SETQ
 SCREENWIDTH (
\DoveDisplay.ScreenWidth
))
						      (
SETQ
 SCREENHEIGHT (
\DoveDisplay.ScreenHeight
)))
		)
	      (
CHANGEBACKGROUND
)
	      (for
 I in
 OLDWINDOWS do
 (\OPENW1
 I)))))
    (
SETQ
 WHOLESCREEN (
SETQ
 WHOLEDISPLAY
	(create
 REGION
		LEFT ← 0
		BOTTOM ← 0
		WIDTH ← SCREENWIDTH
		HEIGHT ← SCREENHEIGHT)))))

(\CreateScreenBitMap

  (LAMBDA (WIDTH HEIGHT)                                     (* jwo: "22-Jul-85 23:51")

    (DECLARE
 (
GLOBALVARS
 \MaxScreenPage))

          (* creates and locks the pages for the display bit map. Returns a BITMAP descriptor for it. Uses the first words of 

	  the segment \DISPLAYREGION.)




          (* * ??? (COND ((OR (NEQ \MACHINETYPE \DAYBREAK) FLG) (FOLDHI (CEIL WIDTH (UNFOLD \DisplayWordAlign BITSPERWORD)) 

	  BITSPERWORD)) (T 52)))



    (
PROG
 ((RASTERWIDTH (
IQUOTIENT
 WIDTH BITSPERWORD))
	   MAXPAGE#)                                         (* the display microcode needs to have the display fall

							     on \DisplayWordAlign word boundaries.)

          (
COND

	    ((
IGREATERP
 (
SETQ
 MAXPAGE# (
SUB1
 (FOLDHI (
ITIMES
 RASTERWIDTH HEIGHT)
						     WORDSPERPAGE)))
			\MaxScreenPage)

          (* new screen size is larger, allocate more pages. All pages are locked. NOERROR is true in \NEWPAGE call in case 

	  pages are already there, e.g. DLBOOT allocated them.)



	      (for
 I from
 (
ADD1
 \MaxScreenPage) to
 MAXPAGE# do
 (
\NEWPAGE
 (
\ADDBASE
 \DISPLAYREGION
										   (UNFOLD I 
										     WORDSPERPAGE))
									 T T))
	      (
SETQ
 \MaxScreenPage MAXPAGE#)))
          (
RETURN
 (
COND

		    ((
BITMAPP
 ScreenBitMap)                  (* reuse the same BITMAP ptr so that it will stay EQ to

							     the one in user datastructures.)

		      (replace
 BITMAPBASE of
 ScreenBitMap with
 \DISPLAYREGION)
		      (replace
 BITMAPWIDTH of
 ScreenBitMap with
 WIDTH)
		      (replace
 BITMAPRASTERWIDTH of
 ScreenBitMap with
 RASTERWIDTH)
		      (replace
 BITMAPHEIGHT of
 ScreenBitMap with
 HEIGHT)
		      ScreenBitMap)
		    (T (create
 BITMAP
			       BITMAPBASE ← \DISPLAYREGION
			       BITMAPRASTERWIDTH ← RASTERWIDTH
			       BITMAPWIDTH ← WIDTH
			       BITMAPHEIGHT ← HEIGHT)))))))
)
(DECLARE: DONTEVAL@LOAD DOCOPY 
(\LOCKFN (FUNCTION \DoveDisplay.SetCursorPosition))
)
(PUTPROPS DOVEDISPLAYHACK COPYRIGHT ("XEROX" 1985))
(DECLARE: DONTCOPY
  (FILEMAP (NIL (502 4347 (\STARTDISPLAY 512 . 2342) (\CreateScreenBitMap 2344 . 4345)))))
STOP